Dimpling apparatus and procedure for hollow parisons



Oct. 20, '1953 J. R. HADEN DIMPLING APPARATUS AND PROCEDURE FOR HOLLOWPARISONS Filed NOV. 7, 1951 3 Sheets-Sheet l gulf- INVENTOR 2039,0/7 l?.Hader? y.. juan/L'MTIM Oct. 20, 1953 .1. R. HADEN 2,655,766

I DIMPLING APPARATUS AND PROCEDURE FOR HOLLOW PARISONS Filed NOV. '7,1951 3 Sheets-Sheet 2 @306 @05 @WML/@hm J. R. HADEN Oct. 20, 1953DIMPLING APPARATUS AND PROCEDURE FOR HOLLOW PARISONS Filed Nov. 7, 19513 Sheets-Sheet 3 Nm MIM mm Nm mm ww mw mmm ml/w mm vm www INVENTORJosep/5 /P. Hao/en Patented Oct. 20, 1953 DIMPLING APPARATUS ANDPROCEDURE FOR HOLLOW PARISONS Joseph R. Haden, MonongaliaI County, W.Va., assignor to Morgantown Glassware Guild, Inc., Morgantown, W. Va., acorporation of West Virginia Application November 1, 1951, Serial No.y,255,255

Claims.

This invention relates to the making of ware in the nature of glasswarefrom vitreous or plastic materials. It relates particularly to theforming of good quality ware provided with dimples or outwardly-concavedepressions in its side walls.

Prior to my present invention, it has been diicult to provide so-calledpinch eiects or dimples that measure up to good quality standards intable or bar ware. At best, the operation has been very expensive,produces many rejects, and has resulted in non-uniform dimples, in anon-uniform spacing of the dimples, and in dimples having a somewhatplanar, inwardly-declining, tablike entry portion that spoils theoverall appearance effect and the symmetry of the design. It has beencustomary to produce such dimples by a hand operation employing a stick.This is time consuming and requires a highly skilled workman to obtainany semblance of accuracy. The danger of objectional distortion of theparison is always present.

If an attempt is made to produce dimples in a mold, a parting seam isalso produced (a onepiece mold cannot be used). Thus, my inventionpertains essentially to the dimpling of better quality ware such as isformed by a blowing operation effected in a one-piece mold. It shouldalso be noted that accuracy becomes more and more important the smallerthe size of the item or article to be provided.

After considerable work in this field, I have discovered a solution tothe problem presented and have been able to simultaneously produceaccurately spaced dimples of substantially fully symmetrical cone shapeabout the side walls of ware in such a manner as to substantiallyeliminate rejects.

An object of my invention has thus been to iind a solution of theproblem presented.

Another object has been to determine the important factors involved inproducing better dimple or pinch effects 'in glasses, goblets, stem-Ware, etc.

A further object has been to devise procedure and apparatus for carryingout the principles oi my invention.

A still further object has been to provide apparatus for simultaneouslyproducing-,uniform dimples at a series of transversely spaced-apartlocations about the wall of an article of ware and without causingundesired distortion or deformation of the ware.

These and many other objects will appear to those skilled in the artfrom' the following description of my invention.

2 In the drawings, Figure 1 is a side view in vertical elevation andpartial section showing apparatus of my invention; in this figure, thedot and dash lines show a starting position of dimpling ngers andactuating mechanism therefor, while the full lines show their nal(substantially horizontal) position.

Figure 1A is a fragmental view in side elevation and partial sectionshowing operating linkage of the apparatus of Figure 1 adjusted toprovide vertically lower indentations or dimples.

Figure 1B is a fragmental view in side elevation and partial sectionshowing a modied form of mold for use in the machine of Figure 1 toadapt it for dimpling a stemware parison.

Figures 2, 3, 4 and 5 are horizontal sections taken, respectively, alongthe lines II-II, III-III, IV-IV and V--V of Figure 1.

Figure 5A is a detail of studs shown in Figure 5.

Figure` 6 isa vertical end elevation taken along the line VI-VI of andon the same scale as Figure 8.

Figure '7 is an enlarged top plan detail of a dimpling finger of theapparatus of Figure 1.

Figure 8 is a side section taken along the line VIII-VIII of and on thesame scale as Figure 7.

Figure 9 is an enlarged side elevation showing a carbon tip used withthe finger of Figure 7; Figure 10 is an enlarged plug end View inelevation of the carbon tip. Y

' Figures 11 to 11D, inclusive, are somewhat diagrammatic views invertical elevation (some being in partial section), illustratingoperational steps employed in accordance with the principles of myinvention. Y

As shown in Figures 11 to 11D, in carrying out my invention, I firstblow-form a parison or halfsham shape 5 -having a relatively thinnerbowl or side Wall portion 5a, al relatively heavierfor thickenedbottomwall end or base portion 5b and a moil top portion 5c. In this step,seeFigure 11, I employ a blow head 6whose pipe 6a is carried by asecured-on swing arm 1. A unitary blow Y mold 8 having a paste layer ais mounted on a table 9. When the parison 5 has reached a semiplasticcondition (at about 2000" F. for soda, potash or lead glass), it istransferred by the blow head 6a. and swing arm 'l Ito a slip-on,relatively shalloW-bottom, positioning mold 28 of an apparatus of myinvention, see Figure 11A. It'

will be noted that mold 28 has a paste layer a and that its height isslightly greater than the `thickness depth of the base or heel A5l'ofthesemiiinished shape orparison 5. At this time, see

38. The connector 31 fits over and is secured (as by welding) to anupper end of a verticallyextending operating rod member 39 that extendsthrough and is slidably'reciprocal within a central opening a in theplatform or lower (primary) table l5. The lower endy portion 39a of theoperating rod member 39 is bifurcated to receive an intermediate portionof a strap-like, foot-actuated, lever member 40 and to which it ispivotally connected by a headed pivotpin 4I. A foot tread 42 is weldedto extend transversely from the front end of the member 40 to move itdownwardly about its opposite or back end. As shown in Figures 1 and 5,the back end of the lever member 40 is pivotally mounted on a cross rod43 and fixed in position thereon by a pair of collars M and their setscrews Ma. The Vcross rod 43 is, see Figure 5, welded at its ends withinholes in and between the pair of back leg members I6.

A tension spring 45, at its upper end shackled to a stud I'Ib on thefront leg member I1 and at its lower end through a hole 40a intheactuating lever member d normally urges the latter -upwardly to thedot and dashposition of Figure 1 against an upper stud stop I'Ic that isxed to and extends from a side of the front leg member I1. A lower studstop Hd, mounted in a like manner, limits the maximum extension of thespring d5, the maximum actuation of the lever mechanism and thus, themaximum inward movement of the dimpling fingers 29 and their tip ends 3Dwith respect to side walls of the parison 5. The dot and dash lines ofFigure 1 showing the starting and return positions of the appaf ratusparts while the full lines show their positions at the completion of theinward movement of the tip ends 30. It will be noted that the fingers 29and their tip ends 30 are on a plane at right angles to the vertical orlongitudinal axis of the parison 5 at the completion of such inwardmovement. 'I'his is also true when the point of vertical contact of thetip ends 30 is varied (see Figure 1A) to provide a different horizontalor transverse plane of contact with the sides of the parison 5 or 5" ofFigure 1A.

The type of inward and outward movement of the ngers effects aninsetting or dimpling operation that assures an absolute accuracy of theoperation (which is essential in smaller sizes of hollow articles suchas a whiskey glass) and dimples that are fully symmetrical. The dimplesnot only give a highly pleasing ornamental eiect, but provide positivefinger grips for holding the article (which is particularly advantageouswhen the article bowl or side walls are wet with moisture or any liquid)It is important that the side walls of the hollow parison 5 be supportedwith a shape-retaining, but a non-attenuating tension while the dimplingoperation is being effected. This is accomplished by resting its bottomon the shallow mold 28 and applying a slight tension to its moil 5c bymeans of the blow head 6. The weight of the bottom 5b of the parison issufficient for this purpose. It is also important that the dimplingfinger ends 30 move forwardly into and backwardly out of contact withrespect to complete their inward movement or depression of the localizedareas 5d of such side walls in a plane substantially parallel to or onsuch transverse'plane. What I claim is:

1. In an apparatus for dimpling a side wall portion of a semi-plastichollow parison of Vitre- Ous-or plastic material .having a supportstandard and-an upper mold table, the combination of, a rod memberoperatively mounted on the standard to extend upwardly therefrom towardsthe mold table, a connector secured on an upper end portion of said rodmember, links each pivotally mounted at one end on said connector, leverarms pivotally mounted intermediate their opposite end portions 0n themold table to extend substantially vertically thereof, lower endDortions of said lever arms being pivotally connected to the other endsof said links, dimpling fingers adjustably secured on upper end portionsof said lever arms to extend'transverselyinwardly therefrom,l a bas-emold mounted on the mold table to receive a base portion of a hollowparison therein, each of said dimpling fingers having a semi-sphericaltip to be moved into a side-wall portion of the parison when it ispositioned on said base mold, said dimpling fingers being securedon'sai'd lever arms to move forwardly Vin an arcuate path towards'saidbase mold into the side wall portion of the parison supported thereby toa final dimpling position with respect to the side wall portion of theparison, and means for actuating said rod member and said dimplingfingers through said links and lever arms to move said tip into and outof the side wall portion of the parison.

2.' In making an improved hollow dimpled article of vitreous or plasticmaterial by utilizing a pressure finger having a semi-spherical tippedend and wherein the material has the characteristic of becoming plasticunder heat application thereto, a method of the character shown anddescribed which comp-rises, providing a hollow parison of the materialin a hot semi-plastic condition, supporting the parison with its sidewall under a positive shape-retaining tension and with its base wallwithin a base mold while forming a symmetrical and uniformly depressedarea of limited extent in the side wall Aof the hot parison by: movingthe tipped end of the pressure nger transversely-inwardly along an arctowards the longitudinal axis of the parison and into point contact withthe side wall thereofv advancing the tipped end inwardly along such arcfrom the Contact point and expanding the contact point into a relativelysmall depressed and substantially symmetrical contacted varea about thetipped end, terminating such inward advance with the longitudinal axisof the tipped end at right angles to the longitudinal axis of theparison, and withdrawing the tipped end backwardly along such are andout of contact with the sidewall without deforming the relatively smalland substantially symmetrically depressed area therein.

hollow parison having a relatively thin side wall j and a thickened basewall is provided and the` tipped end is moved into point leontaet withthe relatively thin side wall and advanced alongthe aro in a directiontowards the thickened base wall thereof.

5. In an apparatus of the character shown and described for makingdepressed substantialli7 symmetrical dimples of limited area withouttablike entry portions in a side wall of a hot semiplastiev hollow parisonof vitreous or plastie ma,- terial which apparatus has a base mold toreceive a base wall of the parisonL the combination of means tovertically support the parison along its longitudinal axis with its sidewall under a positive shape-retaining tension and with its base Wallpositioned Within the mold, at least one pressure nger having asemi-spherical tipped end, an actuating armoperatively oonneeted to saidlinger and having means holding it in a primary position at which itsupports said :finger with its tipped end out of Contact with andextending in a transversely-inelirledv plane towards the side wall ofthe.y parison, lsaid actuating arm having means substantially. limitingY its advance to na secondary position at which it supports saidpressure finger with its tipped end pressed within the side Wall of theparison and on a transverse plane that is lat right angles to 8 thelongitudinal axis oi the parisom means op eratively connected to saidaetuating` arm and advancing said arm from its primary toI its,seeondary position to move the tipped end oi said pressurey fingerytransverselydnwardly along an are; towards.. the,y longitudinal axis offthe,- parison into point contact with its side Wall and along the arefrom the contactpoint into a relatively small depressed andsubstantially symmetrical area within the side Wall and said holdingmeans withdrawing said. actuating arm outwardly from its. secondary toits primary position to move the tipped end of said` iinger4transversely outwardly alongv the arc and out. .of the depressed area.within the. side wall, of. the parison. without deorming the relativelysmall depressedand substantially symmetrical area therein. Y

JQSEPH R HADEN,

References Cited in the Iile of this patent UNITED STATES. PATENTS.

